<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>边框宽度属性</title>
<style type="text/css">
p{border-style:solid;
    border-width:2px;
	border-top-width:3px;}

</style>
</head>

<body>
<p>边框宽的上3px，下左右2px。</p>
</body>
</html>
